added DLL export macro for exporting symbols in VS2017

libvipsCC/include/vips/VDisplay.h

@@ -52,7 +52,7 @@ extern "C" {
 VIPS_NAMESPACE_START
 
 // Wrapper over im_col_display with ref counting
-class VDisplay {
+class VIPS_CC_API VDisplay {
 	struct refblock {
 		im_col_display *disp;	// im_col_display struct
 		im_col_tab_disp *luts;	// luts built from this display

libvipsCC/include/vips/VError.h

@@ -49,7 +49,7 @@
 VIPS_NAMESPACE_START
 
 // Error type
-class VError : public std::exception {
+class VIPS_CC_API VError : public std::exception {
 	std::string _what;
 
 public:
@@ -76,7 +76,7 @@ inline std::ostream &operator<<( std::ostream &file, const VError &err )
 	return( file );
 }
 
-void verror( std::string str = "" );
+void VIPS_CC_API verror( std::string str = "" );
 
 VIPS_NAMESPACE_END
 

libvipsCC/include/vips/VImage.h

@@ -77,7 +77,7 @@ typedef int (*VCallback)( void *, void * );
  * and several other refblocks can have IMAGEs which depend upon this IMAGE
  * for their result.
  */
-class VImage {
+class VIPS_CC_API VImage {
 	/* We'd like this to be protected so that user subclasses can define
 	 * their own member wrappers. But sadly C++ doesn't work like that:
 	 * subclasses of VImage can only refer to protected members via
@@ -89,7 +89,7 @@ public:
  */
 #ifndef SWIG
 	// Count ref etc. in one of these. One for each open VIPS image.
-	struct refblock {
+	VIPS_CC_API struct refblock {
 		_VipsImage *im;			// IMAGE pointer
 		int close_on_delete;		// Set if we must im_close()
 		int nrefs;			// Number of refs to us
@@ -100,7 +100,7 @@ public:
 		virtual ~refblock();
 
 		// Add a ref - this (output image) depends upon IMAGE in
-		void addref( refblock *in );
+		VIPS_CC_API void addref( refblock *in );
 
 		// Remove a ref
 		void removeref();
@@ -420,7 +420,7 @@ public:
  * be part of the public API in case people subclass VImage and add their own
  * members.
  */
-class Vargv {
+class VIPS_CC_API Vargv {
 	// Function we are args to
 	im__function *fn;
 

libvipsCC/include/vips/VMask.h

@@ -73,7 +73,7 @@ union MASKUNION {
 }; 
 
 // Private wrapper over *MASK - user does not see this
-class VPMask {
+class VIPS_CC_API VPMask {
 	friend class VMask;
 
 public:
@@ -102,7 +102,7 @@ public:
 };
 
 // Specialise for INTMASK
-class VPIMask : public VPMask {
+class VIPS_CC_API VPIMask : public VPMask {
 public:
 	VPIMask( int xsize, int ysize );
 	VPIMask( int xsize, int ysize, int scale, int offset, 
@@ -129,7 +129,7 @@ public:
 };
 
 // Specialise for DOUBLEMASK
-class VPDMask : public VPMask {
+class VIPS_CC_API VPDMask : public VPMask {
 public:
 	VPDMask( int xsize, int ysize );
 	VPDMask( int xsize, int ysize, 
@@ -167,7 +167,7 @@ inline std::ostream &operator<<( std::ostream &file,
 #endif /*!SWIG*/
 
 // Wrapper over VP?Mask with ref counting
-class VMask {
+class VIPS_CC_API VMask {
 protected:
 	struct refblock {
 		_private_detail::VPMask *pmask;	// Mask: double or int
@@ -221,11 +221,11 @@ inline std::ostream &operator<<( std::ostream &file, const VMask &msk )
 }
 
 // Need to forward ref these
-class VDMask;
-class VImage;
+class VIPS_CC_API VDMask;
+class VIPS_CC_API VImage;
 
 // Wrapper over _private_detail::VPIMask with ref counting
-class VIMask : public VMask {
+class VIPS_CC_API VIMask : public VMask {
 public:
 	VIMask( int xsize, int ysize )
 	{
@@ -314,7 +314,7 @@ public:
 };
 
 // Wrapper over _private_detail::VPDMask with ref counting
-class VDMask : public VMask {
+class VIPS_CC_API VDMask : public VMask {
 public:
 	VDMask( int xsize, int ysize )
 	{

libvipsCC/include/vips/vips

@@ -35,6 +35,18 @@
 // VImage.h uses GValue for metadata
 #include <glib-object.h>
 
+/* Define VIPS_CC_EXPORTS to build a DLL using MSVC.
+ */
+#ifdef _MSC_VER
+#  ifdef VIPS_CC_EXPORTS
+#    define VIPS_CC_API __declspec(dllexport)
+#  else
+#    define VIPS_CC_API __declspec(dllimport)
+#  endif
+#else
+#  define VIPS_CC_API
+#endif
+
 // If we have already #included the C vips headers, we have to undef a load of
 // stuff to stop vips's stupid macros messing up our enums
 #ifdef IM_VIPS_H